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Official · NWS

Heat Advisory

until 5:00 am

Heat Advisory issued October 3 at 2:02AM PDT until October 4 at 10:00PM PDT by NWS San Francisco CA

Full text

* WHAT...Hot conditions with maximum temperatures in the low-80s to low-90s. Mild minimum temperatures and weak onshore flow will limit overnight relief. * WHERE...The Marin Hills, San Francisco, and Northern Salinas Valley/Hollister Valley and Carmel Valley. * WHEN...From 11 AM this morning to 10 PM PDT Sunday. * IMPACTS...This level of heat affects anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure.

Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

San Francisco; Marin Coastal Range; Northern Salinas Valley/Hollister Valley and Carmel Valley

San Francisco Weather

California 3:16 am local updated now

Partly cloudy

62°

Partly cloudy

Feels like 62°

84° 60° today's high / low
100

Perfect

Outdoor comfort right now

It is 62°F and partly cloudy in San Francisco. Nothing wet on the radar for the next 24 hours. Tomorrow: partly cloudy, high 81°F.

  • Wind 0 mph N
  • Humidity 85%
  • Cloud 56%
  • UV peak 7
  • Rain chance 0%

Next 48 hours

Scroll sideways — or pick a day below.

Now

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3am

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Sun

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Mon

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Conditions in detail

  • Feels like

    62°

    About what it looks like

  • Dew point

    56°

    Comfortable

  • Wind

    0 mph

    Gusting 0 mph from N

  • Pressure

    29.85 inHg

    —

  • Visibility

    9.9 mi

    Clear

  • UV index

    0

    Peaks at 7 today

  • Cloud cover

    56%

    —

  • Precipitation today

    0.00"

    None expected

Air quality

US AQI

57

Moderate

  • PM2.5 15 µg/m³
  • PM10 19 µg/m³
  • Ozone 39 µg/m³
  • NO₂ 26 µg/m³

San Francisco weather questions, answered

Will it rain in San Francisco today?
No — the next 24 hours in San Francisco look dry, with the chance of precipitation peaking at 0%.
How warm does it get in San Francisco today?
San Francisco reaches a high of 84°F and drops to 60°F overnight. Right now it is 62°F and feels like 62°F.
What is the best time to be outside in San Francisco today?
8am looks like the pick — 62°F, partly cloudy, wind 3 mph. Outdoor comfort scores 100 out of 100 (perfect).
What is the weather in San Francisco tomorrow?
Partly cloudy, with a high of 81°F and a low of 64°F — +3.2° cooler than today. Chance of precipitation peaks at 1%.
What time is sunrise and sunset in San Francisco?
The sun rises at 7:07 am and sets at 6:49 pm, giving 11h 42m of daylight.

About this San Francisco forecast

Updated 2026-10-03 10:16 UTC, and refreshed automatically every few minutes. Forecast data is provided by Visual Crossing; radar frames from RainViewer; the 20-year normals and records from the ERA5 reanalysis archive. No national weather service publishes point alerts here, so only computed watches are shown.

Watches labelled computed are worked out on this site from forecast thresholds and are not official warnings — always defer to your national weather service. Need help reading a number? See the sourced weather guide.

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